Threshold Filtering

Threshold filters, following the guidance of Florida Department of Environmental Protection’s (FDEP) Division of Environmental Assessment and Restoration (DEAR) are used to exclude specific results values from the SEACAR Analysis. Based on the threshold filters, Quality Assurance / Quality Control (QAQC) Flags are inserted into the SEACAR_QAQCFlagCode and SEACAR_QAQC_Description columns of the export data. The Include column indicates whether the QAQC Flag will also indicate that data are excluded from analysis. No data are excluded from the data export, but the analysis scripts can use the Include column to exclude data (1 to include, 0 to exclude).

Continuous Water Quality threshold values
Parameter Name	Units	Low Threshold	High Threshold	Sensor Type
Dissolved Oxygen	mg/L	0	50	YSI EXOs
Dissolved Oxygen	mg/L	0	50	Analysis Only - 2022-04-04
Dissolved Oxygen	mg/L	0	50	6600 Series
Salinity	ppt	0	70	6600 Series
Salinity	ppt	0	70	YSI EXOs
Salinity	ppt	0	70	Analysis Only - 2022-04-04
Water Temperature	Degrees C	-5	45	YSI EXOs
Water Temperature	Degrees C	-5	45	Analysis Only - 2022-04-04
Water Temperature	Degrees C	-5	45	6600 Series
pH	pH	2	14	Analysis Only - 2022-04-04
pH	pH	2	14	6600 Series
pH	pH	2	14	YSI EXOs
Dissolved Oxygen Saturation	%	0	500	YSI EXOs
Dissolved Oxygen Saturation	%	0	500	6600 Series
Dissolved Oxygen Saturation	%	0	500	Analysis Only - 2022-04-04
Specific Conductivity	mS/cm	0	100	6600 Series
Specific Conductivity	mS/cm	0	200	YSI EXOs
Turbidity	NTU	0	4000	YSI EXOs
Turbidity	NTU	0	1000	6600 Series
Turbidity	NTU	0	4000	Analysis Only - 2022-04-04

Discrete Water Quality threshold values
Parameter Name	Units	Low Threshold	High Threshold
Dissolved Oxygen	mg/L	0.000001	22
Salinity	ppt	0	70
Water Temperature	Degrees C	3	40
pH		2	13
Dissolved Oxygen Saturation	%	0.000001	310
Specific Conductivity	mS/cm	0.005000001	100
Turbidity	NTU	0	-
Total Suspended Solids (TSS)	mg/L	0	-
Chlorophyll a uncorrected for pheophytin	ug/L	0	-
Chlorophyll a corrected for pheophytin	ug/L	0	-
Secchi Depth	m	0.000001	50
Light Extinction Coefficient	m^1	0	-
Colored dissolved organic matter, CDOM	PCU	0	-
Fluorescent dissolved organic matter, FDOM	QSE	0	-
Total Nitrogen	mg/L	0	-
Total Kjeldahl Nitrogen TKN	mg/L	0	-
NO2+3 Filtered	mg/L	0	-
NH4 Filtered	mg/L	0	-
Total Phosphorus	mg/L	0	-
PO4 Filtered	mg/L	0	-
Ammonia- Un-ionized (NH3)	mg/L	0	-
Nitrate (N)	mg/L	0	-
Nitrite (N)	mg/L	0	-
Nitrogen, organic	mg/L	0	-

Quality Assurance Flags inserted based on threshold checks listed in Table 1 & 2
SEACAR QAQC Description	Include	SEACAR QAQCFlagCode
Exceeds Maximum threshold. Not verified in raw data	No	2Q
Exceeds Maximum threshold. Verified in raw data	No	3Q
Below Minimum threshold. Not verified in raw data	No	4Q
Below Minimum threshold. Verified in raw data	No	5Q
Within threshold tolerance	Yes	6Q
No defined thresholds for this parameter	Yes	7Q

Value Qualifiers

Value qualifier codes included within the data are used to exclude certain results from the analysis. The data are retained in the data export files, but the analysis uses the Include column to filter the results.

STORET and WIN value qualifier codes

Value qualifier codes from STORET and WIN data are examined with the database and used to populate the Include column in data exports.

Value Qualifier codes excluded from analysis
Qualifier Source	Value Qualifier	Include	Description
STORET-WIN	H	No	Value based on field kit determination; results may not be accurate
STORET-WIN	J	No	Estimated value
STORET-WIN	V	No	Analyte was detected at or above method detection limit
STORET-WIN	Y	No

Discrete Water Quality Value Qualifiers

The following value qualifiers are highlighted in the Discrete Water Quality section of this report. An exception is made for Program 476 - Charlotte Harbor Estuaries Volunteer Water Quality Monitoring Network and data flagged with Value Qualifier H are included for this program only.

H - Value based on field kit determiniation; results may not be accurate. This code shall be used if a field screening test (e.g., field gas chromatograph data, immunoassay, or vendor-supplied field kit) was used to generate the value and the field kit or method has not been recognized by the Department as equivalent to laboratory methods.

I - The reported value is greater than or equal to the laboratory method detection limit but less than the laboratory practical quantitation limit.

Q - Sample held beyond the accepted holding time. This code shall be used if the value is derived from a sample that was prepared or analyzed after the approved holding time restrictions for sample preparation or analysis.

S - Secchi disk visible to bottom of waterbody. The value reported is the depth of the waterbody at the location of the Secchi disk measurement.

U - Indicates that the compound was analyzed for but not detected. This symbol shall be used to indicate that the specified component was not detected. The value associated with the qualifier shall be the laboratory method detection limit. Unless requested by the client, less than the method detection limit values shall not be reported

Systemwide Monitoring Program (SWMP) value qualifier codes

Value qualifier codes from the SWMP continuous program are examined with the database and used to populate the Include column in data exports. SWMP Qualifier Codes are indicated by QualifierSource=SWMP.

SWMP Value Qualifier codes
Qualifier Source	Value Qualifier	Include	Description
SWMP	-1	Yes	Optional parameter not collected
SWMP	-2	No	Missing data
SWMP	-3	No	Data rejected due to QA/QC
SWMP	-4	No	Outside low sensor range
SWMP	-5	No	Outside high sensor range
SWMP	0	Yes	Passed initial QA/QC checks
SWMP	1	No	Suspect data
SWMP	2	Yes	Reserved for future use
SWMP	3	Yes
SWMP	4	Yes	Historical: Pre-auto QA/QC
SWMP	5	Yes	Corrected data

Water Column

The water column habitat extends from the surface of all water bodies to the bottom sediments and encompasses the different features found in the water at different depths (National Oceanographic Center, 2016). The water column habitat must be viewed in relation to its interconnectedness with other habitats. A healthy water column is an integral component in ensuring a healthy marine and coastal ecosystem. Having a flourishing marine and coastal ecosystem in Florida is necessary to support a strong economy. The health of the water column is dependent upon factors as diverse as land use (e.g., agriculture, mining, forestry practices); human population growth; emissions, (e.g., power plants, automobiles, wastewater); climate (e.g., rainfall, temperature, winds and currents); and decadal trends (e.g., El Niño/La Niña, Atlantic Multidecadal Oscillation, climate change).

The water column is composed of various physical, chemical and biological features, and only a small number of them are adequately monitored. Features of the water column that are monitored are used as indicators of the water column health and help assess the status of other habitats. These indicators include nutrient concentrations (nitrogen and phosphorus); water quality (dissolved oxygen, temperature, salinity and pH); water clarity (Secchi depth, turbidity, chlorophyll-a and colored dissolved organic matter); and nekton (fish, macroinvertebrates and megafauna).

Seasonal Kendall-Tau Analysis

Indicators must have a minimum of five to ten years, depending on the habitat, of data within the geographic range of the analysis to be included in the analysis. Ten years of data are required for discrete parameters, and five years of data are required for continuous parameters. If there are insufficient years of data, the number of years of data available will be noted and labeled as “insufficient data to conduct analysis”. Further, for the preferred Seasonal Kendall-Tau test, there must be data from at least two months in common across at least two consecutive years within the RCP managed area being analyzed. Values that pass both of these tests will be included in the analysis and be labeled as Use_In_Analysis = TRUE. Any that fail either test will be excluded from the analyses and labeled as Use_In_Analysis = FALSE.

Water Quality - Discrete

The following files were used in the discrete analysis:

Combined_WQ_WC_NUT_Chlorophyll_a_corrected_for_pheophytin-2024-Feb-22.txt
Combined_WQ_WC_NUT_Chlorophyll_a_uncorrected_for_pheophytin-2024-Feb-22.txt
Combined_WQ_WC_NUT_Colored_dissolved_organic_matter_CDOM-2024-Feb-22.txt
Combined_WQ_WC_NUT_Dissolved_Oxygen-2024-Feb-22.txt
Combined_WQ_WC_NUT_Dissolved_Oxygen_Saturation-2024-Feb-22.txt
Combined_WQ_WC_NUT_pH-2024-Feb-22.txt
Combined_WQ_WC_NUT_Salinity-2024-Feb-22.txt
Combined_WQ_WC_NUT_Secchi_Depth-2024-Feb-22.txt
Combined_WQ_WC_NUT_Total_Nitrogen-2024-Feb-22.txt
Combined_WQ_WC_NUT_Total_Phosphorus-2024-Feb-22.txt
Combined_WQ_WC_NUT_Total_Suspended_Solids_TSS-2024-Feb-22.txt
Combined_WQ_WC_NUT_Turbidity-2024-Feb-22.txt
Combined_WQ_WC_NUT_Water_Temperature-2024-Feb-22.txt

Chlorophyll a, Corrected for Pheophytin - Discrete Water Quality

Chlorophyll-a is monitored as a measure of microalgae growing in the water. Algae are a natural part of coastal and aquatic ecosystems but in excess can cause poor water quality and clarity, and decreased levels of dissolved oxygen.

Seasonal Kendall-Tau Trend Analysis
Discrete Water Quality
Map showing location of Discrete sampling sites for Chlorophyll a, Corrected for Pheophytin

The bubble size on the above plots reflects the amount of data available at each sampling site

Programs contributing data for Chlorophyll a, Corrected for Pheophytin
ProgramID	N_Data	YearMin	YearMax
5002	530	2001	2023
103	39	2021	2021

Program names:

5002 - Florida STORET / WIN
103 - EPA STOrage and RETrieval Data Warehouse (STORET)

Value Qualifiers

N_Total is total amount of data for a given year
N_ is the total amount of values flagged with the respective value qualifier in a given year
perc_ is the percent of data flagged with the respective value qualifier as a proportion of N_Total

Value Qualifiers for Chlorophyll a, Corrected for Pheophytin
Year	N_Total	N_I	perc_I	N_Q	perc_Q	N_U	perc_U
2004	47	2	4.3	1	2.1	34	72.3
2007	28	2	7.1			12	42.9
2008	84	1	1.2
2013	15	1	6.7
2020	63	8	12.7			1	1.6
2021	142	10	7.0	9	6.3	5	3.5
2022	105	12	11.4

Note: ¹I - Reported value is greater than or equal to lab method detection limit, but less than quantitation limit ²Q - Sample held beyond the accepted holding time ³U - Compound was analyzed for but not detected

Programs containing Value Qualified data:

5002 - Florida STORET / WIN

Chlorophyll a, Uncorrected for Pheophytin - Discrete Water Quality

Seasonal Kendall-Tau Trend Analysis
Discrete Water Quality
Map showing location of Discrete sampling sites for Chlorophyll a, Uncorrected for Pheophytin

The bubble size on the above plots reflects the amount of data available at each sampling site

Programs contributing data for Chlorophyll a, Uncorrected for Pheophytin
ProgramID	N_Data	YearMin	YearMax
5002	245	2010	2023
103	139	2004	2021
118	2	2005	2006

Program names:

5002 - Florida STORET / WIN
103 - EPA STOrage and RETrieval Data Warehouse (STORET)
118 - National Aquatic Resource Surveys, National Coastal Condition Assessment

Value Qualifiers

N_Total is total amount of data for a given year
N_ is the total amount of values flagged with the respective value qualifier in a given year
perc_ is the percent of data flagged with the respective value qualifier as a proportion of N_Total

Value Qualifiers for Chlorophyll a, Uncorrected for Pheophytin
Year	N_Total	N_I	perc_I	N_Q	perc_Q	N_U	perc_U
2020	64					1	1.6
2021	134	4	3	10	7.5	7	5.2
2022	45	9	20

Programs containing Value Qualified data:

5002 - Florida STORET / WIN

Dissolved Oxygen - Discrete Water Quality

Dissolved Oxygen (DO) is a key indicator of water quality. Oxygen enters surface waters by air-sea gas exchange, by wind action, or as a byproduct of aquatic plant photosynthesis. The actual quantity of DO in aquatic environments is dependent on the above processes as well as water temperature and salinity.

Seasonal Kendall-Tau Trend Analysis
Discrete Water Quality
Map showing location of Discrete sampling sites for Dissolved Oxygen

The bubble size on the above plots reflects the amount of data available at each sampling site

Programs contributing data for Dissolved Oxygen
ProgramID	N_Data	YearMin	YearMax
103	18455	1982	2021
69	14077	2001	2017
5002	2383	1997	2024
95	189	2013	2018
115	4	1995	1995
118	2	2005	2006

Program names:

103 - EPA STOrage and RETrieval Data Warehouse (STORET)
69 - Fisheries-Independent Monitoring (FIM) Program
5002 - Florida STORET / WIN
95 - Harmful Algal Bloom Marine Observation Network
115 - Environmental Monitoring Assessment Program
118 - National Aquatic Resource Surveys, National Coastal Condition Assessment

There are no qualifying Value Qualifiers for Dissolved Oxygen in Nassau River-St. Johns River Marshes Aquatic Preserve

Dissolved Oxygen Saturation - Discrete Water Quality

Seasonal Kendall-Tau Trend Analysis
Discrete Water Quality
Map showing location of Discrete sampling sites for Dissolved Oxygen Saturation

The bubble size on the above plots reflects the amount of data available at each sampling site

Programs contributing data for Dissolved Oxygen Saturation
ProgramID	N_Data	YearMin	YearMax
5002	1099	2000	2024

Program names:

5002 - Florida STORET / WIN

There are no qualifying Value Qualifiers for Dissolved Oxygen Saturation in Nassau River-St. Johns River Marshes Aquatic Preserve

pH - Discrete Water Quality

The pH of water is the measure of how acidic or basic the water body is on a scale of 0-14, with lower readings indicating acidic and higher readings indicating basic, and a pH of 7 being neutral. Florida’s natural waters fall between 6.5 and 8.5 on this scale. A water body’s pH can change due to precipitation, geology, vegetation, water pollution and air pollution.

Seasonal Kendall-Tau Trend Analysis
Discrete Water Quality
Map showing location of Discrete sampling sites for pH

The bubble size on the above plots reflects the amount of data available at each sampling site

Programs contributing data for pH
ProgramID	N_Data	YearMin	YearMax
69	14083	2001	2017
103	8896	1982	2021
5002	2272	1997	2024
95	192	2013	2018
115	3	1995	1995

Program names:

69 - Fisheries-Independent Monitoring (FIM) Program
103 - EPA STOrage and RETrieval Data Warehouse (STORET)
5002 - Florida STORET / WIN
95 - Harmful Algal Bloom Marine Observation Network
115 - Environmental Monitoring Assessment Program

There are no qualifying Value Qualifiers for pH in Nassau River-St. Johns River Marshes Aquatic Preserve

Salinity - Discrete Water Quality

Salinity is a measure of the amount of salt in the water. In estuarine ecosystems, salinity is influenced by precipitation, evaporation, surface-water inputs, and exchange with coastal waters.

Seasonal Kendall-Tau Trend Analysis
Discrete Water Quality
Map showing location of Discrete sampling sites for Salinity

The bubble size on the above plots reflects the amount of data available at each sampling site

Programs contributing data for Salinity
ProgramID	N_Data	YearMin	YearMax
69	14139	2001	2017
5002	2375	1997	2024
95	212	1980	2018
103	136	2004	2008
118	13	2015	2021
115	4	1995	1995

Program names:

69 - Fisheries-Independent Monitoring (FIM) Program
5002 - Florida STORET / WIN
95 - Harmful Algal Bloom Marine Observation Network
103 - EPA STOrage and RETrieval Data Warehouse (STORET)
118 - National Aquatic Resource Surveys, National Coastal Condition Assessment
115 - Environmental Monitoring Assessment Program

There are no qualifying Value Qualifiers for Salinity in Nassau River-St. Johns River Marshes Aquatic Preserve

Secchi Depth - Discrete Water Quality

Secchi depth is a measure of the transparency or clarity of the water by a device called a Secchi disk. A Secchi disk is a black and white disk that is lowered into the water on a cord. The Secchi depth is the depth at which the disk can no longer be seen. The deeper the Secchi depth, the greater the water clarity.

Seasonal Kendall-Tau Trend Analysis
Discrete Water Quality
Map showing location of Discrete sampling sites for Secchi Depth

The bubble size on the above plots reflects the amount of data available at each sampling site

Programs contributing data for Secchi Depth
ProgramID	N_Data	YearMin	YearMax
69	14096	2001	2017
5002	435	2000	2024
103	94	1982	2021

Program names:

69 - Fisheries-Independent Monitoring (FIM) Program
5002 - Florida STORET / WIN
103 - EPA STOrage and RETrieval Data Warehouse (STORET)

Value Qualifiers

N_Total is total amount of data for a given year
N_ is the total amount of values flagged with the respective value qualifier in a given year
perc_ is the percent of data flagged with the respective value qualifier as a proportion of N_Total

Value Qualifiers for Secchi Depth
Year	N_Total	N_S	perc_S
2017	813	1	0.1
2020	63	1	1.6
2021	66	1	1.5

Note: ¹S - Secchi disk visible to bottom of waterbody

Programs containing Value Qualified data:

5002 - Florida STORET / WIN

Total Nitrogen - Discrete Water Quality

Nitrogen and Phosphorous are key nutrients that provide nourishment essential for the growth and maintenance of aquatic plants and animals; however, excess nutrients can cause harmful algal blooms and other water quality concerns. Nutrients enter water bodies several ways, including runoff from rain events and atmospheric deposition from natural and industrial sources.

Total Nitrogen Calculation:

The logic for calculated Total Nitrogen was provided by Kevin O’Donnell and colleagues at FDEP (with the help of Jay Silvanima, Watershed Monitoring Section). The following logic is used, in this order, based on the availability of specific nitrogen components.

TN = TKN + NO3O2;
TN = TKN + NO3 + NO2;
TN = ORGN + NH4 + NO3O2;
TN = ORGN + NH4 + NO2 + NO3;
TN = TKN + NO3;
TN = ORGN + NH4 + NO3;

Additional Information:

Rules for use of sample fraction:
- FDEP report that if both “Total” and “Dissolved” are reported, only “Total” is used. If the total is not reported, they do use dissolved as a best available replacement.
- An analysis of all SEACAR data shows that 90% of all possible TN calculations can be done using nitrogen components with the same sample fraction, rather than use nitrogen components with mixed total/dissolved sample fractions. In other words, TN can be calculated when TKN and NO3O2 are both total sample fraction, or when both are dissolved sample fraction. This is important, because then the calculated TN value is not based on components with mixed sample fractions.
Values inserted into data:
- ParameterName = “Total Nitrogen”
- SEACAR_QAQCFlagCode = “1Q”
- SEACAR_QAQC_Description = “SEACAR Calculated”
  Seasonal Kendall-Tau Trend Analysis
  
  Map showing location of Discrete sampling sites for Total Nitrogen
  
  The bubble size on the above plots reflects the amount of data available at each sampling site

Programs contributing data for Total Nitrogen
ProgramID	N_Data	YearMin	YearMax
5002	803	1997	2023
103	94	1988	2005

Program names:

5002 - Florida STORET / WIN
103 - EPA STOrage and RETrieval Data Warehouse (STORET)

There are no qualifying Value Qualifiers for Total Nitrogen in Nassau River-St. Johns River Marshes Aquatic Preserve

Total Phosphorus - Discrete Water Quality

Seasonal Kendall-Tau Trend Analysis
Discrete Water Quality
Map showing location of Discrete sampling sites for Total Phosphorus

The bubble size on the above plots reflects the amount of data available at each sampling site

Programs contributing data for Total Phosphorus
ProgramID	N_Data	YearMin	YearMax
5002	1255	1997	2023
103	376	1983	2021

Program names:

5002 - Florida STORET / WIN
103 - EPA STOrage and RETrieval Data Warehouse (STORET)

Value Qualifiers

N_Total is total amount of data for a given year
N_ is the total amount of values flagged with the respective value qualifier in a given year
perc_ is the percent of data flagged with the respective value qualifier as a proportion of N_Total

Value Qualifiers for Total Phosphorus
Year	N_Total	N_I	perc_I	N_Q	perc_Q	N_U	perc_U
2002	14			1	7.1
2003	8	1	12.5
2004	86	12	13.9
2005	24	8	33.3
2006	24	14	58.3
2007	75	28	37.3	2	2.7
2008	67	33	49.2	1	1.5
2009	55	36	65.4
2010	55	22	40.0
2011	36	15	41.7	2	5.6
2012	24	14	58.3
2013	37	16	43.2
2014	39	28	71.8	3	7.7
2015	131	92	70.2	10	7.6
2016	36	19	52.8
2017	57	35	61.4	2	3.5
2020	99	17	17.2	1	1.0
2021	204	21	10.3	2	1.0	1	0.5
2022	151	10	6.6			1	0.7
2023	58			11	19.0

Programs containing Value Qualified data:

5002 - Florida STORET / WIN

Total Suspended Solids - Discrete Water Quality

Total Suspended Solids (TSS) are solid particles suspended in water that exceed 2 microns in size and can be trapped by a filter.

Seasonal Kendall-Tau Trend Analysis
Discrete Water Quality
Map showing location of Discrete sampling sites for Total Suspended Solids

The bubble size on the above plots reflects the amount of data available at each sampling site

Programs contributing data for Total Suspended Solids
ProgramID	N_Data	YearMin	YearMax
5002	726	1997	2023
103	321	1983	2021

Program names:

5002 - Florida STORET / WIN
103 - EPA STOrage and RETrieval Data Warehouse (STORET)

Value Qualifiers

N_Total is total amount of data for a given year
N_ is the total amount of values flagged with the respective value qualifier in a given year
perc_ is the percent of data flagged with the respective value qualifier as a proportion of N_Total

Value Qualifiers for Total Suspended Solids
Year	N_Total	N_I	perc_I	N_Q	perc_Q	N_U	perc_U
2001	7					1	14.3
2006	12	1	8.3	1	8.3
2007	49	3	6.1
2009	27	1	3.7	1	3.7
2010	28	2	7.1
2011	17	1	5.9	2	11.8
2012	12	5	41.7
2013	26	3	11.5
2014	20	3	15.0
2015	69	16	23.2	6	8.7
2016	21	4	19.0
2017	31	2	6.4
2020	56			8	14.3
2021	150	2	1.3
2022	112	6	5.4

Programs containing Value Qualified data:

5002 - Florida STORET / WIN

Turbidity - Discrete Water Quality

Turbidity results from suspended solids in the water, including silts, clays, tannins, industrial wastes, sewage and plankton, which are all factors that contribute to how clouded or murky a water column is. Turbidity is caused by soil erosion, excess nutrients, pollutants, and physical forces such as winds, currents and bottom feeders.

Seasonal Kendall-Tau Trend Analysis
Discrete Water Quality
Map showing location of Discrete sampling sites for Turbidity
$Discrete Water Quality$
The bubble size on the above plots reflects the amount of data available at each sampling site

Programs contributing data for Turbidity
ProgramID	N_Data	YearMin	YearMax
103	15270	1985	2021
5002	838	1997	2023

Program names:

103 - EPA STOrage and RETrieval Data Warehouse (STORET)
5002 - Florida STORET / WIN

Value Qualifiers

N_Total is total amount of data for a given year
N_ is the total amount of values flagged with the respective value qualifier in a given year
perc_ is the percent of data flagged with the respective value qualifier as a proportion of N_Total

Value Qualifiers for Turbidity
Year	N_Total	N_I	perc_I	N_Q	perc_Q
2007	53	1	1.9
2011	17	1	5.9	3	17.6
2012	12	2	16.7	2	16.7
2013	26	3	11.5	1	3.9
2014	20	1	5.0	6	30.0
2015	69	1	1.4	3	4.3
2016	21			1	4.8
2021	173			1	0.6

Note: ¹I - Reported value is greater than or equal to lab method detection limit, but less than quantitation limit ²Q - Sample held beyond the accepted holding time

Programs containing Value Qualified data:

5002 - Florida STORET / WIN

Water Temperature - Discrete Water Quality

Temperature determines the capacity of water to hold oxygen. Cooler water can hold more dissolved oxygen because water molecules are more tightly packed, making it harder for oxygen to escape. Additionally, as water temperature increases, fish and other aquatic organisms become more active and consume oxygen at a faster rate.

Seasonal Kendall-Tau Trend Analysis
Discrete Water Quality
Map showing location of Discrete sampling sites for Water Temperature

The bubble size on the above plots reflects the amount of data available at each sampling site

Programs contributing data for Water Temperature
ProgramID	N_Data	YearMin	YearMax
103	19853	1982	2021
69	14142	2001	2017
5002	2401	1997	2024
95	212	2007	2018
115	4	1995	1995

Program names:

There are no qualifying Value Qualifiers for Water Temperature in Nassau River-St. Johns River Marshes Aquatic Preserve

Water Quality - Continuous

The following files were used in the continuous analysis:

Combined_WQ_WC_NUT_cont_Dissolved_Oxygen_NE-2024-Feb-22.txt
Combined_WQ_WC_NUT_cont_Dissolved_Oxygen_Saturation_NE-2024-Feb-22.txt
Combined_WQ_WC_NUT_cont_pH_NE-2024-Feb-22.txt
Combined_WQ_WC_NUT_cont_Salinity_NE-2024-Feb-22.txt
Combined_WQ_WC_NUT_cont_Turbidity_NE-2024-Feb-22.txt
Combined_WQ_WC_NUT_cont_Water_Temperature_NE-2024-Feb-22.txt

Seasonal Kendall-Tau Results for All Stations - Water Temperature
Station	N_Data	N_Years	Period of Record	Median	tau	SennIntercept	SennSlope	p
02231291	127	2	2015 - 2016	14.80	-	-	-	-
NEHM	27857	2	2022 - 2023	23.90	-	-	-	-
NEKD	118328	8	2004 - 2011	22.10	-0.04	21.88	-0.01	0.8057
NELC	100343	7	2005 - 2011	22.70	0.05	22.26	0.04	0.7405
NELN	17025	1	2023 - 2023	27.70	-	-	-	-
NENR	31438	3	2009 - 2011	22.00	-	-	-	-
NCB19020038	34483	5	2015 - 2019	24.78	-0.03	23.32	-0.01	1.0000
NCBARD16	7419	2	2015 - 2016	25.08	-	-	-	-
NCBNRCM	35817	5	2015 - 2019	24.03	0.07	23.26	0.05	0.6681

Nassau River-St. Johns River Marshes Aquatic Preserve

SEACAR Habitat Analyses

Last compiled on 18 March, 2024

Threshold Filtering

Value Qualifiers

Water Column

Seasonal Kendall-Tau Analysis

Water Quality - Discrete

Chlorophyll a, Corrected for Pheophytin - Discrete Water Quality

Chlorophyll a, Uncorrected for Pheophytin - Discrete Water Quality

Dissolved Oxygen - Discrete Water Quality

Dissolved Oxygen Saturation - Discrete Water Quality

pH - Discrete Water Quality

Salinity - Discrete Water Quality

Secchi Depth - Discrete Water Quality

Total Nitrogen - Discrete Water Quality

Total Phosphorus - Discrete Water Quality

Total Suspended Solids - Discrete Water Quality

Turbidity - Discrete Water Quality

Water Temperature - Discrete Water Quality

Water Quality - Continuous

Dissolved Oxygen - Continuous Water Quality

NEKD

NELC

NCB19020038

NCBNRCM

All Stations Combined

Dissolved Oxygen Saturation - Continuous Water Quality

NEKD

NELC

NCB19020038

NCBNRCM

All Stations Combined

pH - Continuous Water Quality

NEKD

NELC

NCB19020038

NCBNRCM

All Stations Combined

Salinity - Continuous Water Quality

NEKD

NELC

NCB19020038

NCBNRCM

All Stations Combined

Turbidity - Continuous Water Quality

NEKD

NELC

NCB19020038

NCBNRCM

All Stations Combined

Water Temperature - Continuous Water Quality

NEKD

NELC

NCB19020038

NCBNRCM

All Stations Combined